Yes, I have all root mail from my VPS delivered to my own email address. I've been with Fastmail since the beginning of this year but was previously with Microsoft 365 Exchange Online. I had no issues once I had DKIM and SPF configured correctly. I also made sure that any Bitfolk IP addresses I was using for mail delivery (both IPv4 and IPv6) had PTR records that matched the hostname - i.e. the IP addresses in the A and AAAA records resolved back to the hostnames.